Update develop (#5)

* refactor

host/online_compile/hip_utility/binary_cache.cpp

@@ -0,0 +1,112 @@
+/*******************************************************************************
+ *
+ * MIT License
+ *
+ * Copyright (c) 2017 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ *******************************************************************************/
+
+#include <binary_cache.hpp>
+#include <handle.hpp>
+#include <md5.hpp>
+#include <env.hpp>
+#include <stringutils.hpp>
+#include <logger.hpp>
+#include <target_properties.hpp>
+#include <boost/filesystem.hpp>
+#include <fstream>
+#include <iostream>
+
+namespace online_compile {
+
+OLC_DECLARE_ENV_VAR(OLC_DISABLE_CACHE)
+OLC_DECLARE_ENV_VAR(HOME)
+
+static boost::filesystem::path ComputeCachePath()
+{
+    const char* home_dir = GetStringEnv(HOME{});
+    if(home_dir == nullptr || home_dir == std::string("/") || home_dir == std::string(""))
+    {
+        home_dir = "/tmp";
+    }
+
+    auto p = boost::filesystem::path{home_dir} / "_hip_binary_kernels_";
+
+    if(!boost::filesystem::exists(p))
+        boost::filesystem::create_directories(p);
+    return p;
+}
+
+boost::filesystem::path GetCachePath()
+{
+    static const boost::filesystem::path user_path = ComputeCachePath();
+
+    return user_path;
+}
+
+static bool IsCacheDisabled() { return online_compile::IsEnabled(OLC_DISABLE_CACHE{}); }
+
+boost::filesystem::path
+GetCacheFile(const std::string& device, const std::string& name, const std::string& args)
+{
+    // std::string filename = (is_kernel_str ? online_compile::md5(name) : name) + ".o";
+    std::string filename = name + ".o";
+    return GetCachePath() / online_compile::md5(device + ":" + args) / filename;
+}
+
+boost::filesystem::path LoadBinary(const TargetProperties& target,
+                                   const size_t num_cu,
+                                   const std::string& name,
+                                   const std::string& args)
+{
+    if(online_compile::IsCacheDisabled())
+        return {};
+
+    (void)num_cu;
+    auto f = GetCacheFile(target.DbId(), name, args);
+    if(boost::filesystem::exists(f))
+    {
+        return f.string();
+    }
+    else
+    {
+        return {};
+    }
+}
+
+void SaveBinary(const boost::filesystem::path& binary_path,
+                const TargetProperties& target,
+                const std::string& name,
+                const std::string& args)
+{
+    if(online_compile::IsCacheDisabled())
+    {
+        boost::filesystem::remove(binary_path);
+    }
+    else
+    {
+        auto p = GetCacheFile(target.DbId(), name, args);
+        boost::filesystem::create_directories(p.parent_path());
+        boost::filesystem::rename(binary_path, p);
+    }
+}
+
+} // namespace online_compile